Sofa



FIG. 1 is a front perspective view of a sofa in a first configuration showing my new design;

FIG. 2 is a rear perspective view of an sofa in a first configuration as shown in FIG. 1;

FIG. 3 is front perspective view of a sofa in a second configuration;

FIG. 4 is front perspective view of a sofa in a third configuration;

FIG. 5 is front perspective view of a sofa in a fourth configuration; and,

FIG. 6 is a rear perspective view of a sofa in a forth configuration as shown in FIG. 5. 

The ornamental design for a sofa, as shown. 